diff --git a/flake.lock b/flake.lock
index 9b7e5e5..71470e8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -5,11 +5,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1690933134,
-        "narHash": "sha256-ab989mN63fQZBFrkk4Q8bYxQCktuHmBIBqUG1jl6/FQ=",
+        "lastModified": 1698882062,
+        "narHash": "sha256-HkhafUayIqxXyHH1X8d9RDl1M2CkFgZLjKD3MzabiEo=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "59cf3f1447cfc75087e7273b04b31e689a8599fb",
+        "rev": "8c9fa2545007b49a5db5f650ae91f227672c3877",
         "type": "github"
       },
       "original": {
@@ -18,29 +18,13 @@
         "type": "github"
       }
     },
-    "generic-data-functions": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1691181981,
-        "narHash": "sha256-ORD6AAiXM5tNqiau+KZ24GSnHX2cBMl071jjZab+gzo=",
-        "owner": "raehik",
-        "repo": "generic-data-functions",
-        "rev": "b09706c468300c6e8f701871a08296244ba2b0e1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "raehik",
-        "repo": "generic-data-functions",
-        "type": "github"
-      }
-    },
     "haskell-flake": {
       "locked": {
-        "lastModified": 1691763544,
-        "narHash": "sha256-QQsSI5VXm0bBijeGSXXNf4fyw76/XmN67NGbmTCx71s=",
+        "lastModified": 1699388095,
+        "narHash": "sha256-uutZJWtd6rKwoLYLFGsjrA2zu06uRdGC//FANb4azgU=",
         "owner": "srid",
         "repo": "haskell-flake",
-        "rev": "f16e7ac05b1f22b66ef05b7fcc8a96281bb2b749",
+        "rev": "7029034b00bd7c9225d74915a6a53e5b44b4a1d3",
         "type": "github"
       },
       "original": {
@@ -51,16 +35,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1692355892,
-        "narHash": "sha256-kskXKeYG9aRkur4cB4OtsetvDsmttGeqllLwyePNmI4=",
+        "lastModified": 1700014976,
+        "narHash": "sha256-dSGpS2YeJrXW5aH9y7Abd235gGufY3RuZFth6vuyVtU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "edcf830429642d06eee298cbcff6b0e61fa24cd4",
+        "rev": "592047fc9e4f7b74a4dc85d1b9f5243dfe4899e3",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "haskell-updates",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -68,11 +52,11 @@
     "nixpkgs-lib": {
       "locked": {
         "dir": "lib",
-        "lastModified": 1690881714,
-        "narHash": "sha256-h/nXluEqdiQHs1oSgkOOWF+j8gcJMWhwnZ9PFabN6q0=",
+        "lastModified": 1698611440,
+        "narHash": "sha256-jPjHjrerhYDy3q9+s5EAsuhyhuknNfowY6yt6pjn9pc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9e1960bc196baf6881340d53dccb203a951745a2",
+        "rev": "0cbe9f69c234a7700596e943bfae7ef27a31b735",
         "type": "github"
       },
       "original": {
@@ -86,7 +70,6 @@
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
-        "generic-data-functions": "generic-data-functions",
         "haskell-flake": "haskell-flake",
         "nixpkgs": "nixpkgs"
       }
diff --git a/flake.nix b/flake.nix
index 7f62c41..de037ad 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,34 +1,46 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/haskell-updates";
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
     haskell-flake.url = "github:srid/haskell-flake";
-    generic-data-functions = {
-      url = "github:raehik/generic-data-functions";
-      flake = false;
-    };
   };
-  outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
-    flake-parts.lib.mkFlake { inherit inputs; } {
-      systems = nixpkgs.lib.systems.flakeExposed;
+  outputs = inputs:
+  let
+    # simple devshell for non-dev compilers: really just want `cabal repl`
+    nondevDevShell = compiler: {
+      mkShellArgs.name = "${compiler}-binrep";
+      hoogle = false;
+      tools = _: {
+        hlint = null;
+        haskell-language-server = null;
+        ghcid = null;
+      };
+    };
+  in
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = inputs.nixpkgs.lib.systems.flakeExposed;
       imports = [ inputs.haskell-flake.flakeModule ];
       perSystem = { self', pkgs, config, ... }: {
-        packages.default = self'.packages.binrep;
-        haskellProjects.ghc96 = import ./haskell-flake-ghc96.nix pkgs;
-        haskellProjects.default = {
-          #basePackages = config.haskellProjects.ghc96.outputs.finalPackages;
-          packages = {
-            #generic-data-functions.source = inputs.generic-data-functions;
-            #strongweak.source = "0.6.0";
-            #flatparse.source = "0.4.1.0";
-          };
-          devShell = {
-            tools = hp: {
-              ghcid = null; # broken on GHC 9.6? fsnotify
-              hlint = null; # broken on GHC 9.6?
-              haskell-language-server = null; # TAKES AGES TO BUILD FFS
+        packages.default  = self'.packages.ghc96-binrep;
+        devShells.default = self'.devShells.ghc96;
+        haskellProjects.ghc96 = {
+          # 2023-11-14: GHC 9.6 base package set is borked
+          # PR: https://github.com/NixOS/nixpkgs/pull/267477
+          basePackages = pkgs.haskell.packages.ghc96.override {
+            overrides = self: super: {
+              fgl = self.fgl_5_8_2_0;
+              th-desugar = self.th-desugar_1_16;
             };
           };
+          devShell.mkShellArgs.name = "ghc96-binrep";
+        };
+        haskellProjects.ghc94 = {
+          basePackages = pkgs.haskell.packages.ghc94;
+          devShell = nondevDevShell "ghc94";
+        };
+        haskellProjects.ghc92 = {
+          basePackages = pkgs.haskell.packages.ghc92;
+          devShell = nondevDevShell "ghc92";
         };
       };
     };